Year	% of total teachers
1998	100
1999	100
2000	100
2001	100
2002	100
2003	100
2004	100
2005	100
2006	100
2007	100
2008	100
2009	100
2010	97.5719985961914
2011	98.5429992675781
2012	99.3610000610352
2013	100
2014	100
2016	100
2018	93.2699966430664
2019	88.9440002441406
2022	99.6790008544922